Improvement in saw-grinding machines



N. PETERS, PHOTD-LITHOGRAFHER, WASHINGTON. 0. S.

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TH oMA-s' ".GAMBLE,o'rf-RiCHMoN'D, .v'IneNIAp` :turnover/mm* nv sewenmnme MACHINES Leners Patent No. 90,163, mandy 1s, 1869.

Thescheduleiefened to in thse Letters Patent and "making of the same.

drawings, forminglpartoflthisspeciiication. This invention relates to'improvements in machines for grinding saws, the object of which is to provide a more convenient method`of adjusting the stones as they wear away.` T I i p It consists lin an improved method of arranging the bearings of the journals for adj ustme'nt, as will be more p fully hereinafter described.` i A l Figure 1 represents an elevation, partly longitudinal and partly sectional, of my improved machine, and

Figui-e2 represents a plan view, with a part, of the i .framing` removed. p p

Similar letters of rele-rence indicatevlike parts. f i i The journal-boxes A, of `the stones, are 'arranged to V `be capable `of vertical movement between housings B, both for the upper and lower stones, arranged in de tachable connection with the side framings C, and to some extentlnaintained initlieir" position by'theyokeconnections i) ofthe wedges used for adjusting the bearings, whichlatter rest upon blocks which may be readily introduced underithe said bearings, or'taken therefrom as the stones change indiameter. f

The-blocks E, next above the wedges, arevprovided "with one inclined face, in order to preserve the upper face in which the otherblocks rest in a horizontal plane.

As the lower stone wearsaway, the blocks are added under the bearings, while they are removed` from the `V upper boxes. v

The wedges E'are connected tothe yokes D, which are provided with the screws G, for moving thernone way or the other under the boxes, or the blocks on which,`

the boxes rest.

H represents feeding-rollers for conveying the saws, or other articles to be ground, back and forth und'r the stone, of which the lower ones are connected together by a system of gearing', to canse each setto move uniformly together. lhey may be operated by powerapplied to the wheel I, or otherwise; and the upper rollers are borne down against the lower ones by springs bearing on their journals.

Havingthus described my invention,

,I claim yas new, and desire vto secure by Letters Patent- `The combination of the housings B, boxes A, blocks 4 E and wedges, connected by the adjustable yokes D, when arranged substantially as andforthe purpose described.' g

- THOMAS GAMBLE; Witnesses.:

H. P. CLINTON WM. T. ALLEN. 

